ACDelco Engine Coolant Water Inlet Seal

The ACDelco Engine Coolant Water Inlet Seal (also called a water inlet gasket, thermostat housing seal, or coolant inlet O-ring) creates a leak-resistant seal between the engine's water inlet or thermostat housing and the mating surface. It helps keep coolant in the cooling system, where it can circulate and control engine temperature.

Key Features:

• Seals the coolant water inlet connection to help prevent external coolant leaks
• Made from sealing materials chosen to hold up to engine heat, pressure, and coolant exposure
• Part of the ACDelco line of replacement parts, which General Motors supports as its original-equipment parts brand
• Replaces a worn, hardened, or leaking seal so the cooling system can work as designed
• Often replaced along with the thermostat or water inlet housing

A fresh water inlet seal helps protect the engine from overheating and coolant loss. Choose the individual part number that matches your application from the options listed on this page.